Chapter 7: Input and Output

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Light Pen

A light-sensitive penlike device. The ____ is placed against the monitor: this closes a photoelectric circuit and identifies the spot for entering or modifying data. For example, ____ are used to edit digital images and drawings.

Touch screen monitors

A particular kind of monitor with a clear plastic outer layer. Behind this layer are crisscrossed invisible beams of infrared light. _____ are easy to use, especially when people need information quickly. They are commonly used at restaurants, automated teller machines, and information centers.

Joystick

A popular input device for computer games. You control game actions by varying the pressure, speed, and direction of the _____.

Bar code readers

AKA scanners from grocery stores; these devices are either handheld wand readers or platform scanners. They contain photoelectric cells that scan or read bar codes, or the vertical zebra-striped marks printed on product containers. ____ system: Universal Product Code (UPC)

Optical Scanner

Accepts documents consisting of text and/or images and converts them to machine-readable form. These devices recognize light, dark, and colored areas that make up individual letters or images. Typically, scanned documents are saved in files that can be further processed, displayed, printed, or stored for later use. There are two basic types of ____. Flatbed and portable.

Input

Any data or instructions that are used by a computer. They can come directly from you or from other sources. You provide ___ whenever you use system or application programs. ___ devices are hardware used to translate words, sounds, images, and actions that people understand into a form that the system unit can process.

WebCam

Are specialized digital video cameras that capture images and send them to a computer for broadcast over the Internet. Some ____ are built-in while others are designed to be attached to the computer monitor.

Mouse

Controls a pointer that is displayed on the monitor. The ____ pointer usually appears in the shape of an arrow. A ____ can have one, two, or more buttons, which are used to select command options and to control the mouse pointer on the monitor. There are three basic designs: Optical mouse, mechanical mouse, and cordless or wireless mouse

Dot-matrix printers

Form characters and images using a series of small pins on a print head. Once a widely used microcomputer printer, they are inexpensive and reliable but quite noisy. In general, they are used for tasks where high-quality output is not required.

Pixels

Images are formed on a monitor by a series of dots or ___ (picture elements).

Printer Resolution

It is a measure of the clarity of images produced. ____ is measured in dpi (dot per inch). Most printers designed for personal use average 1,200 dpi. The higher the dpi, the better the quality of images produced.

PDA

Personal Digital Assistant

Output

Processed data or information. ___ typically takes the form of text, graphics, photos, audio, and/or video. For example, when you create a presentation using a presentation graphics program, you typically input text and graphics. You also could include photographs and even add voice narration. The ___ would be the completed presentation.

Photo printer

Special-purpose printers designed to print photo-quality images from digital cameras. Most ____ print 3X5" or 4X6" images on glossy, photo-quality paper.

Plotter

Special-purpose printers for producing a wide range of specialized output. Using output from graphics tablets and other graphical input devices, ___ create maps, images, and architectural and engineering drawings. ___ are typically used by graphic artists, engineers, and architects to print out designs, sketches, and drawings.

Inkjet printer

Spray ink at high speed onto the surface of paper. This process not only produces a letter-quality image but also permits printing to be done in a variety of colors, making them ideal for select special applications. _____ are the most widely used printers: reliable, quiet, and relatively inexpensive.

Microphone

The most widely used audio-input device is the ____. Voice recognition systems use a _____, a sound card, and special software.

Stylus

a penlike device commonly used with tablet PCs and PDAs. A ____ uses pressure to draw images on a screen. Often, a ____ interacts with the computer through handwriting recognition software.

Tablet PC

a portable personal computer equipped with a touch screen as a primary input device.

multitouch screen

allows for interactions such as rotation graphical objects on the screen w/ hand or zooming in and out by pinching and stretching ur fingers

Projector Monitors/Data projectors (?)

are specialized devices similar to slide projectors. These devices, however, connect to microcomputers and project computer output just as it would appear on a monitor. Commonly used for presentations

Flat-panel monitors

are the most widely used type of monitor today. Compared to other types, they are thinner, more portable, and require less power to operate.

document

can quickly scan multipage docs

cloud

connected to internet providing printing services to others on the internet

navigation keys

control the cursor or insertion point on the screen

windows key

displays the start menu

features that determine clarity of image

dot pitch, size, aspect and contrast ratio, resolution

e-ink

e book readers use this tech. to produce images that reflect light like ordinary paper, making the display easy to read

optical mouse

emits and sense light to detect mouse movement

numeric keypads

enter numbers and arithmetic symbols and controls cursor or insertion point

Flexible keyboards

fold or roll up for easy packing or storage. They are designed to proved mobile users with a full-sized keyboard with minimal storage requirements.

Traditional keyboards

full-sized, rigid, rectangular keyboards that include function, navigational, and numeric keys.

portable

handheld device that slides across the doc to be scanned

E-book readers

handheld, book-sized devices that display text and graphics. Using content downloaded from the Web or from special cartridges, these devices are used to read newspapers, magazines, and entire books.

mechanical mouse

has the ball at bottom

Refresh rate

indicates how often a displayed image is updated or refreshed. The faster the ____ (the more frequently images are redrawn), the better the quality of images displayed.

ink-jet printers

inexpensive and reliable

Printer speed

is measured in the number of pages printed per minute. Typically, printers for personal use average 15-19 pages per minute for single-color output and 13-15 pages per minute for color output.

Resolution

is one of the most important monitor features. Images are formed on a monitor by a series of dots or pixels. _____ is expressed as a matrix of these pixels. The higher the monitor's resolution (the more pixels), the clearer the image produced. measures the clarity of an image

Voice over IP (VoIP)

is the transmission of telephone calls over computer networks. AKA telephony, Internet telephony, and IP telephony, ____ uses the Internet rather than traditional communication lines to support voice communication.

flatbed

like a copy machine

advantages of flat panel monitors over other types

more portable, require less power, thinner

types of character & mark recognition devices

optical-character magnetic-ink character optical-mark

photo

print photo quality images from digital cams

duplex

printing on both sides

color

provided by most printers but expensive to use

Optical-mark recognition (OMR)

senses the presence or absence of a mark, such as a pencil mark. OMR is often used to score standardized multiple-choice tests

function keys

shortcuts for specific tasks

Ergonomic keyboards

similar to traditional keyboards. They keyboard arrangement, however, is not rectangular and a palm rest is provided. They are designed specifically to alleviate wrist strain associated with the repetitive movements of typing.

portable

small and lightweight designed to work w/ notebook computers

memory

stores printing instructions and docs waiting to be printed

Dot pitch

the distance between each pixel. The lower the ___ (the shorter the distance between the pixels), the clearer the images produced.

VoIP

the transmission of tele calls over computer networks

RFID

tiny chips that contain electronically stored info

Wireless keyboards

transmit input to the system unit through the air. By eliminating connecting wires to the system unit, these keyboards provide greater flexibility and convenience.

Personal laser printers

typically do not support color, are less expensive, and are used by many single users. They typically can print 15 to 17 pages a minute.

Shared laser printers

typically support color, are more expensive, and are used (shared) by a group of users. Shared laser printers typically print over 50 pages a minute

Cathode-ray tube (CRT)

until recently, the most common type of monitor for the office and the home was the ____. These monitors are typically placed directly on the system unit or on the desktop. ____ are similar in size and technology to televisions. Low cost and excellent resolution; bulky, less energy efficient. outdated tech and when discarded are a serious threat to our environment

maxicodes

used by UPS to automate the process of routing packages, tracking in-transit packages, and locating lost packages

Magnetic-ink character recognition (MICR)

used by banks to automatically read those unusual numbers on the bottom of checks and deposit slips.

UPCs

used by retail stores to automate the processes to check out customers, to change produce prices, and maintain inventory records

wireless mouse

uses radiowaves or infrared light waves to communicate w/ system unit

Optical-character recognition (OCR)

uses special preprinted characters that can be read by a light source and changed into machine-readable code. A common ___ device is the handheld wand reader (used in department stores to read retail price tags).

LCD monitor

widely used for older monitors and less expensive

thermal

widely used w/ atms and gas pumps to print receipts

aspect ratio

width of monitor divided by height